public void Dispose()
{
if (_ctl != null)
{
Marshal.ReleaseComObject(_ctl);
_ctl = null;
}
}
internal AudioSession(Interfaces.IAudioSessionControl2 ctl)
{
_ctl = ctl;
}
private static Interfaces.ISimpleAudioVolume GetSystemSoundsVolumeObject()
{
Interfaces.IMMDeviceEnumerator deviceEnumerator = null;
Interfaces.IAudioSessionEnumerator sessionEnumerator = null;
Interfaces.IAudioSessionManager2 mgr = null;
Interfaces.IMMDevice speakers = null;
try
{
// get the speakers (1st render + multimedia) device
deviceEnumerator = (Interfaces.IMMDeviceEnumerator)(new Interfaces.MMDeviceEnumerator());
deviceEnumerator.GetDefaultAudioEndpoint(Interfaces.EDataFlow.eRender, Interfaces.ERole.eMultimedia, out speakers);
// activate the session manager. we need the enumerator
Guid IID_IAudioSessionManager2 = typeof(Interfaces.IAudioSessionManager2).GUID;
object o;
speakers.Activate(IID_IAudioSessionManager2, 0, IntPtr.Zero, out o);
mgr = (Interfaces.IAudioSessionManager2)o;
// enumerate sessions for on this device
mgr.GetSessionEnumerator(out sessionEnumerator);
int count;
sessionEnumerator.GetCount(out count);
// search for an audio session with the required process-id
Interfaces.ISimpleAudioVolume volumeControl = null;
for (int i = 0; i < count; ++i)
{
Interfaces.IAudioSessionControl2 ctl = null;
try
{
sessionEnumerator.GetSession(i, out ctl);
ctl.GetDisplayName(out string val);
if (val.ToLower().Contains("@%systemroot%\\system32\\audiosrv.dll"))
{
volumeControl = ctl as Interfaces.ISimpleAudioVolume;
break;
}
}
finally
{
}
}
return(volumeControl);
}
finally
{
if (sessionEnumerator != null)
{
Marshal.ReleaseComObject(sessionEnumerator);
}
if (mgr != null)
{
Marshal.ReleaseComObject(mgr);
}
if (speakers != null)
{
Marshal.ReleaseComObject(speakers);
}
if (deviceEnumerator != null)
{
Marshal.ReleaseComObject(deviceEnumerator);
}
}
}
